/*
 * Copyright 2021 DataCanvas
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.dingodb.calcite.rule;

import io.dingodb.calcite.rel.DingoTableSpool;
import io.dingodb.calcite.traits.DingoConvention;
import org.apache.calcite.plan.Convention;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.convert.ConverterRule;
import org.apache.calcite.rel.core.TableSpool;
import org.apache.calcite.rel.logical.LogicalTableSpool;
import org.checkerframework.checker.nullness.qual.Nullable;

public class DingoTableSpoolRule extends ConverterRule {

    public static final Config DEFAULT_CONFIG = Config.INSTANCE
        .withConversion(LogicalTableSpool.class, Convention.NONE,
            DingoConvention.INSTANCE, "TableSpoolRule")
        .withRuleFactory(DingoTableSpoolRule::new);

    public DingoTableSpoolRule(Config config) {
        super(config);
    }

    @Override
    public @Nullable RelNode convert(RelNode relNode) {
        TableSpool spool = (TableSpool) relNode;
        return DingoTableSpool.create(
            convert(spool.getInput(),
                spool.getInput().getTraitSet().replace(DingoConvention.INSTANCE)),
            spool.readType,
            spool.writeType,
            spool.getTable()
        );
    }
}
